Does the green LED emit light when you connect the banana plug wires across it? What does that say about the threshold voltage of the green LED compared to the blue LED?

Yes.

Explanation:

-This is because the threshold voltage for the green light is much lower than that of the blue light.

-A longer wavelength in the greenlight necesitates the need for a lower voltage in the banana plug.

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min